<template>
  <div class="app-container">
    讲师表单
     <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name"/>
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" controls-position="right" :min=0 />
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <el-option :value="1" label="高级讲师"/>
          <el-option :value="2" label="首席讲师"/>
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career"/>
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
      </el-form-item>

      <!-- 讲师头像 -->
      <el-form-item label="讲师头像">
        <!-- 头衔缩略图 -->
        <pan-thumb :image="teacher.avatar"/>
        <!-- 文件上传按钮 -->
        <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
      </el-button>

      <!--
      v-show：是否显示上传组件
      :key：类似于id，如果一个页面多个图片上传控件，可以做区分
      :url：后台上传的url地址
      @close：关闭上传组件
      @crop-upload-success：上传成功后的回调 
        <input type="file" name="file"/>
      -->
      <image-cropper
        v-show="imagecropperShow"
        :width="300"
        :height="300"
        :key="imagecropperKey"
        :url="uploadURL"
        field="file"
        @close="close"
        @crop-upload-success="cropSuccess"/>
      </el-form-item>

      <el-form-item>
        <el-button :disabled="saveBtnDisabled" v-if="hasPerm('teacher.add')" type="primary" @click="saveOrUpdate">保存</el-button>
      </el-form-item>
    </el-form>

  </div>
</template>
<script>
import teacherApi from '@/api/edu/teacher'
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'
export default {
  data() {
    return {
      teacher:{
        name: '',
        sort: 0,
        level: 1,
        career: '',
        intro: '',
        avatar: 'shenzhen.aliyuncs.com/2020/09/22/8ccc7732cff94a0ba6f7e808e6754917file.png'
      },
      imagecropperShow:false,
      imagecropperKey:0,
      uploadURL:process.env.BASE_API+'/oss/file',//获取dev.env.js中的地址
      saveBtnDisabled:false  // 保存按钮是否禁用,
    }
  },
  components:{ImageCropper,PanThumb},
  created() { //页面渲染之前执行
    this.init()
  },
  watch: {  //监听
    $route(to, from) { //路由变化方式，路由发生变化，方法就会执行
      this.init()
    }
  },
  methods:{
    init() {
      //判断路径有id值,做修改
      if(this.$route.params && this.$route.params.id) {
          //从路径获取id值
          const id = this.$route.params.id
          //调用根据id查询的方法
          this.getInfo(id)
      } else { //路径没有id值，做添加
        //清空表单
        this.teacher = {
          name: '',
          sort: 0,
          level: 1,
          career: '',
          intro: '',
          avatar: 'http://microcloud-college-oss.oss-cn-shenzhen.aliyuncs.com/2020/09/22/8ccc7732cff94a0ba6f7e808e6754917file.png'
        }
      }
    },
    //根据讲师id查询的方法
    getInfo(id) {
      teacherApi.getTeacherInfo(id)
        .then(response => {
          this.teacher = response.data.teacher
        })
    },
    saveOrUpdate() {
      //判断修改还是添加
      //根据teacher是否有id
      if(!this.teacher.id) {
        //添加
        this.saveTeacher()
      } else {
        //修改
        this.updateTeacher()
      }
    },
    //修改讲师的方法
    updateTeacher() {
      teacherApi.updateTeacherInfo(this.teacher)
        .then(response => {
          //提示信息
          this.$message({
              type: 'success',
              message: '修改成功!'
          });
          //回到列表页面 路由跳转
          this.$router.push({path:'/edu/teacher/list'});
        })
    },
    //添加讲师的方法
    saveTeacher() {
      teacherApi.addTeacher(this.teacher)
        .then(response => {//添加成功
          //提示信息
          this.$message({
              type: 'success',
              message: '添加成功!'
          });
          //回到列表页面 路由跳转
          this.$router.push({path:'/edu/teacher/list'})
        })
    },
    close(){
      this.imagecropperShow = false;
      this.imagecropperKey = this.imagecropperKey+1;
    },
    cropSuccess(data){
      this.imagecropperShow = false;
      this.teacher.avatar = data.url;
      this.imagecropperKey = this.imagecropperKey+1;
    }

  }
}
</script>
